Geosaurus

Young, Mark Thomas & Andrade, Marco Brandalise De, 2009, What is Geosaurus? Redescription of Geosaurus giganteus (Thalattosuchia: Metriorhynchidae) from the Upper Jurassic of Bayern, Germany, Zoological Journal of the Linnean Society 157 (3), pp. 551-585 : 559

GEOSAURUS CUVIER, 1824

Type species: Geosaurus giganteus ( Von Sömmerring, 1816) Cuvier, 1824 sensu Von Quenstedt, 1852 .

Emended diagnosis: Metriorhynchid thalattosuchian possessing brevirostrine to short mesorostrine snout; strongly lateromedially compressed teeth, with the dental carinae formed by a raised ridge (keel), finely serrated (composed of true denticles); maxillary crowns moderately enlarged; cranial bones smooth, lacking conspicuous ornamentation; prefrontal teardrop-shaped, with the inflexion point directed posteriorly approximately 70° from the anteroposterior axis of the skull; acute angle formed by the lateral and medial processes of the frontal; antorbitol cavity present and much longer than higher; lacrimal–prefrontal fossa present, with a crest along the sutural contact.